Centrifugal pump



FIG. 1 is a front, right, top perspective view of a centrifugal pump, showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top planar view thereof; and,

FIG. 7 is a bottom planar view thereof.

The portions of the article shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a centrifugal pump, as shown and described. 